RESTOR多焦点人工晶体对比敏感度的研究

研究白内障术后以RESTOR为代表的多焦人工晶体与以AR40e(AMO)为代表的传统的单焦球面人工晶体早期功能视力的比较.研究组为白内障超声乳化联合人工晶体植入术后患者60例(眼),其中30例为传统的单焦球面人工晶体组,30例为多焦人工晶体组.与研究组年龄匹配的门诊患者30例为正常对照组.于术后30 d用CSV-1000E对比敏感度测试仪(由VECTOR VISION公司提供)进行CSF测定.所有患者年龄分布在50～80之间,矫正视力均大于等于0.8,并且除了白内障之外无任何影响对比敏感度的眼疾,亦无其它可能会影响对比敏感度的全身性疾病.白内障术后患者的CSF大致恢复到正常范围,但较正常年龄组降低.多焦点人工晶体植入术后提高了患者的全程视敏度,但早期功能视力不及传统的单焦球面人工晶体.     

零球差与负球差的非球面人工晶体植入术后视觉质量临床研究

目的对植入两种不同球差非球面人工晶体白内障患者术后矫正视力、对比敏感度、波前像差进行了对比研究,评价两组非球面人工晶体植入术后视觉质量,进而指导白内障患者选择人工晶体.方法选取行白内障超声乳化摘除术联合非球面人工晶体植入术的白内障患者40人(64只眼),植入AKreos Ao Iol(零球差非球面人工晶体)16例(30眼)列入AO组;植入Acryof IQ Iol(负球差非球面人工晶体)24例(34眼)列入IQ组.随诊3个月,对两组患者术后矫正视力、对比敏感度、波前像差应用SPSS 16.0统计学软件进行统计分析.结果两组术后3个月最佳矫正远视力无统计学意义,IQ组近视力优于AO近视力.在明视、暗视环境下和暗视合并周边眩光环境下对比敏感度,两组无差异.在波前像差检查中发现,AO组总球差(0.04±0.03)高于IQ组(0.15±0.06),垂直慧差IQ组(-0.13±0.06)高于AO组(-0.21±0.07).结论零球差非球面人工晶体保留部分角膜球差,有助于提高远视的视觉质量,而负球差非球面人工晶体保留部分垂直慧差,有助于近视的视觉质量.     

老年性白内障超声乳化配合人工晶体植入术治疗的效果

研究分析老年性白内障超声乳化配合人工晶体植入术治疗的效果。选取2013年1月~2015年10月到高台县人民医院就诊的老年性白内障患者118例,根据随机数字表法将其分为研究组和对照组,每组59例。给予对照组小切口白内障摘除术配合人工晶体植入术治疗,给予研究组超声乳化配合人工晶体植入术治疗,观察两组术后1d、30d的视力水平情况及并发症发生情况。研究组术后1d、30d视力水平均明显高于对照组(P0.05);研究组并发症发生率5.08%明显低于对照组16.95%(P0.05)。采用超声乳化配合人工晶体植入术治疗老年性白内障可明显改善患者视力水平,降低并发症发生率,值得临床推广和使用。     

Acrysof Toric人工晶体治疗合并角膜散光老年性白内障的疗效观察

目的探讨Acrysof Toric人工晶体治疗合并角膜散光老年性白内障的疗效.方法选取术前存在角膜散光的老年性白内障患者31例(34眼).采用白内障超声乳化摘除术植入Acrysof Toric人工晶体,分别于术前、术后首日、术后1周、术后1个月、术后3个月时检测患者裸眼视力、最佳矫正视力、角膜曲率,观察Toric人工晶体轴向位置和转动度数.结果术前患眼最佳矫正视力为0.1~0.5,术后3个月时31例患眼裸眼视力0.5;26例患眼裸眼视力≥0.8;32例患眼最佳矫正视力≥0.8.术前角膜散光度值、预期残余散光度值、术后3个月时残余散光均值三者间差异具有统计学意义(F=9.251,P0.05).术后3个月残余散光均值明显低于术前角膜散光值,差异具有显著统计学意义(t=17.264,P0.01);术后残余散光值与预期值之间差异无统计学意义(t=0.517,P0.05).术后首日9眼偏离了预定轴位,平均偏差为4.02°±0.65°,其中4眼偏差大于10°.术后3个月时与术后首日相比,人工晶体旋转均值为2.48°±1.96°,其中仅1眼旋转幅度10°,余下的33眼旋转幅度均5°.结论植入Acrysof Toric人工晶体可有效提升合并角膜散光老年性白内障患者的视力,矫正术前角膜散光,且稳定性较佳.     

超声乳化联合前段玻璃体切割治疗白内障晶体半脱位

目的:探讨超声乳化联合前段玻璃体切割囊袋内人工晶体植入治疗白内障晶体半脱位临床疗效及可行性.方法:选取因外伤伴有晶状体半脱位的白内障患者36例(36只眼).患者首先做常规白内障透明角膜切口,撕囊、水分离、超声乳化晶状体吸出,同时切除溢出到前房的玻璃体,囊袋内植入人工晶体.结果:36例(36只眼)患者均顺利摘除浑浊的晶状体,成功地保留了后囊膜,并在囊袋内植入了人工晶体,28例患者人工晶体位置较正,8例略向下移位.术后视力0.1~0.5者24例;0.5~1.0者11例;1例失明(均随访半年).结论:超声乳化吸出联合前段玻璃体切割囊袋内人工晶体植入手术治疗晶状体半脱位的白内障是一种安全、有效的手术方式.     

白内障超声乳化和折叠人工晶体植入125例临床分析

目的探讨囊膜上超声乳化、机械劈核和人工晶体植入术治疗白内障的疗效.方法采用10点半处透明角膜隧道切口,对125例白内障患者行超声乳化摘出、折叠人工晶体植入术.结果术后第一天、一周裸眼视力≥0.5者分别为60%、89.6%,术后3个月以上裸眼视力为≥1.0占76%术后三个月平均散光为0.78±0.66D.结论透明角膜隧道切口,高负压低能量白内障超声乳化具有术后早期视力恢复快,切口自闭好,屈光状态稳定,并发症少等优点,是值得推广的手术方法.     

小切口非超声乳化白内障摘出人工晶体植入术临床观察

采用小切口非超声乳化手术对 4 86例 4 86眼白内障患者进行白内障摘出和人工晶体植入术 结果表明 :术后 1周矫正视力≥ 0 .5者占 80 % ,术后角膜散光绝对平均值为 (0 .86± 1.5 2 )D ,而且术后并发症少     

小切口非超乳白内障摘除及后房型人工晶体植入术临床分析

目的 探讨小切口非超乳白内障摘除及后房型人工晶体植入术的临床效果 方法 对192眼白内障行小切口非超乳摘除及后房型人工晶体植入术 结果 术后1月内裸眼视力或矫正视≥0.3的162眼(84.4%).术后3个月≥0.3的181眼(94.3%),散光0.99±0.55D 结论 小切口非超乳白内障摘除及后房型人工晶体植入术获得良好疗效,手术方法易掌握,费用低,特别适合农村患者.     

白内障不同术式对术后早期角膜散光的影响

目的：比较白内障囊外除术加人工晶体会晤入术与小切口白内障超声乳化术加人工晶体植入术术后早期对角膜散光的影响。方法：对４０例老年性白内患行白内障囊外除术加人工晶体植入术（ＥＣＣＥ术），５６例患行小切口白内障超声乳化术中人工晶体往往 Ｐ（ＰＨＡＣＯ术）。在双倍角极坐标系中采用矢量分析法，比较两种术式术后早期角膜散光的影响。结果：术后１ｄ、１周、１个月时，ＰＨＡＣＯ术的角膜散光改变远低于ＥＣＣＥ     

超声乳化加入工晶体植入术治疗白内障的护理体会

超声乳化白内障吸除人工晶体植入是目前国内外眼科领域显微创手中最具先进性、实用性、推广的顶尖技术，其特点以最快最好的方法实现伤口小、愈合快、术后并发症少，视力恢复快，术中无出血，术后散光小，白内障未成熟就可手术的优势主导眼科新朝流。为使白内障手术获得     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.